|Monthly Tech-Tip |
The ideal drying chamber is a tunnel. Starter tunnels pass wheeled-ware-carts single file. Hot dry air enters where the ware exits. The moving air touches all surfaces and picks up humidity as it moves toward the ware entrance. The tunnel must be calibrated so that air reaching the entrance, is still very warm, but of high humidity (laden with water it got from ware down the tunnel). When an equal volume of ware is passing constantly, manual calibration of cart movement, air volume and temperature is possible. But if flow is not constant then your "dynamic system" needs multi-location monitoring and intervention. Locating wireless thermometer/hygrometers and actuators is a good early-start to the project. ESP8266 controllers are revolutionizing industrial control. As cheap as $5, they are tiny but completely capable battery-powered WIFI servers. One of these little things can email you! Even display a web page. These communicate with a central dashboard online (in-plant control systems are now obsolete). There are many online dashboard services that talk to these devices and display results graphically. And it is easy to make your own. Hiring a technician on upwork.com to design a system for you is only a matter of a few thousand (even hundreds) of dollars. Shown here is an Amazon listing for a development kit of an 8266, sensor and cables. I included a listing for a ready-made one, but it is expensive, not well described. A similar product line sells under the name "SensorPush".
Drying Ceramics Without Cracks
Anything ceramic ware can be dried if it is done slowly and evenly enough. To dry faster optimize the body recipe, ware cross section, drying process and develop a good test to rate drying performance.
The Physics of Clay Bodies
Learn to test your clay bodies and recording the results in an organized way and understanding the purpose of each test and how to relate its results to changes that need to be made in process and recipe.
In ceramics, drying performance is very important to optimizing production. More plastic clays shrink more and crack more, but they are also better to work with.